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Troubleshooting
Installer reference guide
190
E EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C – 2022.09
Error code
Detailed error code Description
L5
00
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
P4
00
OU: Malfunction of radiating
fin temperature sensor.
Please contact your dealer.
U0
00
OU: Shortage of refrigerant.
Please contact your dealer.
U2
00
OU: Defect of power supply
voltage.
Please contact your dealer.
U7
00
OU: Transmission malfunction
between main CPU- INV CPU.
Please contact your dealer.
Error codes of the indoor unit
Error code
Detailed error code Description
7H
01
Water flow problem.
7H
04
Water flow problem during domestic
hot water production.
Manual reset.
Check the domestic hot water circuit.
7H
05
Water flow problem during heating/
sampling.
Manual reset.
Check the space heating/cooling circuit.
7H
06
Water flow problem during cooling/
defrost.
Manual reset.
Check the plate heat exchanger.
7H
07
Water flow problem.
Pump deblocking active
80
00
Returning water temperature
sensor problem.
Please contact your dealer.